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Acetalization of ketones on K-10 clay and rare earth exchanged HFAU-Y zeolites: A mild and facile procedure for the synthesis of dimethylacetals

Thomas, Bejoy and Sugunan, S (2006) Acetalization of ketones on K-10 clay and rare earth exchanged HFAU-Y zeolites: A mild and facile procedure for the synthesis of dimethylacetals. In: Journal of Porous Materials, 13 (2). pp. 99-106.

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Abstract

Dimethylacetals of ketones; cyclohexanone, acetophenone, and benzophenone have been prepared by reacting ketones with methanol under mild reaction conditions. Large pore zeolites (H-Y and its rare earth metal, $Ce^3^+$, $La^3^+$, and $RE^3^+$ modified forms), and mesoporous clay (K-10 montmorillonite and its cerium exchanged counterpart) with regular pore structure, silica and silica-alumina have been used as catalysts. Clay catalysts are found to be much more active than zeolites, thanks to slightly bigger pore size. The nature of the pores of the solid acid catalysts determine acetalization efficiency of a particular catalyst. As evidenced by the reaction time studies, the catalyst decay is greater over the zeolites than over the clays. Carrying out the reaction with ketones of different molecular sizes it is shown that K-10 clays and rare earth exchanged H-Y zeolites are promising environmentally friendly catalysts for their use in the production fine chemicals.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Keywords: Acetalization;Dimethylacetal;K-10 montmorillonite clay;Ce-montmorillonite clay;Rare earth exchanged H-Y zeolite
Department/Centre: Division of Chemical Sciences > Sophisticated Instruments Facility
Date Deposited: 22 May 2006
Last Modified: 27 Aug 2008 11:59
URI: http://eprints.iisc.ernet.in/id/eprint/6760

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